Profiler::__construct() - Code Metrics - Inspection of "Update Scrutinizer config" - yiisoft/profiler - Measure and Improve Code Quality continuously with Scrutinizer

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by Alexander

created 2020-11-18 10:49 UTC

Profiler::__construct() A

↳ Parent: Profiler

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	3
CRAP Score	1

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	2
c	1
b	0
f	0
dl	0
loc	4
ccs	3
cts	3
cp	1
rs	10
cc	1
nc	1
nop	1
crap	1

<?php

declare(strict_types=1);

namespace Yiisoft\Profiler;

use Psr\Log\LogLevel;
use Psr\Log\LoggerInterface;

/**
 * Profiler provides profiling support. It stores profiling messages in the memory and sends them to different targets
 * according to {@see targets}.
 *
 * For more details and usage information on Profiler, see the [guide article on profiling](guide:runtime-profiling)
 */
class Profiler implements ProfilerInterface
{
    /**
     * @var bool whether to profiler is enabled. Defaults to true.
     * You may use this field to disable writing of the profiling messages and thus save the memory usage.
     */
    private bool $enabled = true;

    /**
     * @var array[] complete profiling messages.
     * Each message has a following keys:
     *
     * - token: string, profiling token.
     * - category: string, message category.
     * - nestedLevel: int, profiling message nested level.
     * - beginTime: float, profiling begin timestamp obtained by microtime(true).
     * - endTime: float, profiling end timestamp obtained by microtime(true).
     * - duration: float, profiling block duration in milliseconds.
     * - beginMemory: int, memory usage at the beginning of profile block in bytes, obtained by `memory_get_usage()`.
     * - endMemory: int, memory usage at the end of profile block in bytes, obtained by `memory_get_usage()`.
     * - memoryDiff: int, a diff between 'endMemory' and 'beginMemory'.
     */
    private array $messages = [];

    /**
     * @var LoggerInterface logger to be used for message export.
     */
    private LoggerInterface $logger;

    /**
     * @var array pending profiling messages, e.g. the ones which have begun but not ended yet.
     */
    private array $pendingMessages = [];

    /**
     * @var int current profiling messages nested level.
     */
    private int $nestedLevel = 0;

    /**
     * @var array|Target[] the profiling targets. Each array element represents a single {@see Target|profiling target}
     * instance or the configuration for creating the profiling target instance.
     */
    private array $targets = [];

    /**
     * @var bool whether {@see targets} have been initialized, e.g. ensured to be objects.
     */
    private bool $isTargetsInitialized = false;


    /**
     * Initializes the profiler by registering {@see flush()} as a shutdown function.
     * @param LoggerInterface $logger
     */
    public function __construct(LoggerInterface $logger)
    {
        $this->logger = $logger;
        register_shutdown_function([$this, 'flush']);
    }

    /**
     * @return bool the profile enabled.
     *
     * {@see enabled}
     */
    public function getEnabled(): bool
    {
        return $this->enabled;
    }

    /**
     * @return array the messages profiler.
     */
    public function getMessages(): array
    {
        return $this->messages;
    }

    /**
     * @return Target[] the profiling targets. Each array element represents a single {@see Target|profiling target}
     * instance.
     */
    public function getTargets(): array
    {
        if (!$this->isTargetsInitialized) {
            foreach ($this->targets as $name => $target) {
                if (!$target instanceof Target) {
                    $this->targets[$name] = new $target['__class']($target['logger'], $target['level']);
                }
            }
            $this->isTargetsInitialized = true;
        }

        return $this->targets;
    }

    /**
     * Set the profiler enabled or disabled.
     *
     * @param bool $value
     *
     * @return void
     *
     * {@see enabled}
     */
    public function setEnabled(bool $value): void
    {
        $this->enabled = $value;
    }

    /**
     * Set messages profiler.
     *
     * @param array $value
     *
     * @return void
     *
     * {@see messages}
     */
    public function setMessages(array $value): void
    {
        $this->messages = $value;

        $this->dispatch($this->messages);
    }

    /**
     * @param array|Target[] $targets the profiling targets. Each array element represents a single
     * {@see Target|profiling target} instance or the configuration for creating the profiling target instance.
     */
    public function setTargets(array $targets): void
    {
        $this->targets = $targets;
        $this->isTargetsInitialized = false;
    }

    /**
     * Adds extra target to {@see targets}.
     *
     * @param Target|array $target the log target instance or its DI compatible configuration.
     * @param string|null $name array key to be used to store target, if `null` is given target will be append
     * to the end of the array by natural integer key.
     */
    public function addTarget($target, ?string $name = null): void
    {
        if (!$target instanceof Target) {
            $this->isTargetsInitialized = false;
        }

        if ($name === null) {
            $this->targets[] = $target;
        } else {
            $this->targets[$name] = $target;
        }
    }

    public function begin(string $token, array $context = []): void
    {
        if (!$this->enabled) {
            return;
        }

        $category = $context['category'] ?? 'application';

        $message = array_merge($context, [
            'token' => $token,
            'category' => $category,
            'nestedLevel' => $this->nestedLevel,
            'beginTime' => microtime(true),
            'beginMemory' => memory_get_usage(),
        ]);

        $this->pendingMessages[$category][$token][] = $message;
        $this->nestedLevel++;
    }

    public function end(string $token, array $context = []): void
    {
        if (!$this->enabled) {
            return;
        }

        $category = $context['category'] ?? 'application';

        if (empty($this->pendingMessages[$category][$token])) {
            throw new \InvalidArgumentException(
                'Unexpected ' . static::class .
                '::end() call for category "' .
                $category .
                '" token "' .
                $token . '". A matching begin() is not found.'
            );
        }

        $message = array_pop($this->pendingMessages[$category][$token]);
        if (empty($this->pendingMessages[$category][$token])) {
            unset($this->pendingMessages[$category][$token]);

            if (empty($this->pendingMessages[$category])) {
                unset($this->pendingMessages[$category]);
            }
        }

        $message = array_merge(
            $message,
            $context,
            [
                'endTime' => microtime(true),
                'endMemory' => memory_get_usage(),
            ]
        );

        $message['duration'] = $message['endTime'] - $message['beginTime'];
        $message['memoryDiff'] = $message['endMemory'] - $message['beginMemory'];

        $this->messages[] = $message;
        $this->nestedLevel--;
    }

    public function flush(): void
    {
        foreach ($this->pendingMessages as $category => $categoryMessages) {
            foreach ($categoryMessages as $token => $messages) {
                if (!empty($messages)) {
                    $this->logger->log(
                        LogLevel::WARNING,
                        'Unclosed profiling entry detected: category "' . $category . '" token "' . $token . '"' . ' ' .
                        __METHOD__
                    );
                }
            }
        }

        $this->pendingMessages = [];
        $this->nestedLevel = 0;

        if (empty($this->messages)) {
            return;
        }

        $messages = $this->messages;

        // new messages could appear while the existing ones are being handled by targets
        $this->messages = [];

        $this->dispatch($messages);
    }

    /**
     * Dispatches the profiling messages to {@see targets}.
     *
     * @param array $messages the profiling messages.
     */
    protected function dispatch(array $messages): void
    {
        foreach ($this->getTargets() as $target) {
            $target->collect($messages);
        }
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Profiler;
6
7		use Psr\Log\LogLevel;
8		use Psr\Log\LoggerInterface;
9
10		/**
11		* Profiler provides profiling support. It stores profiling messages in the memory and sends them to different targets
12		* according to {@see targets}.
13		*
14		* For more details and usage information on Profiler, see the [guide article on profiling](guide:runtime-profiling)
15		*/
16		class Profiler implements ProfilerInterface
17		{
18		/**
19		* @var bool whether to profiler is enabled. Defaults to true.
20		* You may use this field to disable writing of the profiling messages and thus save the memory usage.
21		*/
22		private bool $enabled = true;
23
24		/**
25		* @var array[] complete profiling messages.
26		* Each message has a following keys:
27		*
28		* - token: string, profiling token.
29		* - category: string, message category.
30		* - nestedLevel: int, profiling message nested level.
31		* - beginTime: float, profiling begin timestamp obtained by microtime(true).
32		* - endTime: float, profiling end timestamp obtained by microtime(true).
33		* - duration: float, profiling block duration in milliseconds.
34		* - beginMemory: int, memory usage at the beginning of profile block in bytes, obtained by `memory_get_usage()`.
35		* - endMemory: int, memory usage at the end of profile block in bytes, obtained by `memory_get_usage()`.
36		* - memoryDiff: int, a diff between 'endMemory' and 'beginMemory'.
37		*/
38		private array $messages = [];
39
40		/**
41		* @var LoggerInterface logger to be used for message export.
42		*/
43		private LoggerInterface $logger;
44
45		/**
46		* @var array pending profiling messages, e.g. the ones which have begun but not ended yet.
47		*/
48		private array $pendingMessages = [];
49
50		/**
51		* @var int current profiling messages nested level.
52		*/
53		private int $nestedLevel = 0;
54
55		/**
56		* @var array\|Target[] the profiling targets. Each array element represents a single {@see Target\|profiling target}
57		* instance or the configuration for creating the profiling target instance.
58		*/
59		private array $targets = [];
60
61		/**
62		* @var bool whether {@see targets} have been initialized, e.g. ensured to be objects.
63		*/
64		private bool $isTargetsInitialized = false;
65
66
67		/**
68		* Initializes the profiler by registering {@see flush()} as a shutdown function.
69		* @param LoggerInterface $logger
70		*/
71	4	public function __construct(LoggerInterface $logger)
72		{
73	4	$this->logger = $logger;
74	4	register_shutdown_function([$this, 'flush']);
75	4	}
76
77		/**
78		* @return bool the profile enabled.
79		*
80		* {@see enabled}
81		*/
82		public function getEnabled(): bool
83		{
84		return $this->enabled;
85		}
86
87		/**
88		* @return array the messages profiler.
89		*/
90	3	public function getMessages(): array
91		{
92	3	return $this->messages;
93		}
94
95		/**
96		* @return Target[] the profiling targets. Each array element represents a single {@see Target\|profiling target}
97		* instance.
98		*/
99	2	public function getTargets(): array
100		{
101	2	if (!$this->isTargetsInitialized) {
102	2	foreach ($this->targets as $name => $target) {
103	2	if (!$target instanceof Target) {
104	1	$this->targets[$name] = new $target['__class']($target['logger'], $target['level']);
105		}
106		}
107	2	$this->isTargetsInitialized = true;
108		}
109
110	2	return $this->targets;
111		}
112
113		/**
114		* Set the profiler enabled or disabled.
115		*
116		* @param bool $value
117		*
118		* @return void
119		*
120		* {@see enabled}
121		*/
122	1	public function setEnabled(bool $value): void
123		{
124	1	$this->enabled = $value;
125	1	}
126
127		/**
128		* Set messages profiler.
129		*
130		* @param array $value
131		*
132		* @return void
133		*
134		* {@see messages}
135		*/
136		public function setMessages(array $value): void
137		{
138		$this->messages = $value;
139
140		$this->dispatch($this->messages);
141		}
142
143		/**
144		* @param array\|Target[] $targets the profiling targets. Each array element represents a single
145		* {@see Target\|profiling target} instance or the configuration for creating the profiling target instance.
146		*/
147	1	public function setTargets(array $targets): void
148		{
149	1	$this->targets = $targets;
150	1	$this->isTargetsInitialized = false;
151	1	}
152
153		/**
154		* Adds extra target to {@see targets}.
155		*
156		* @param Target\|array $target the log target instance or its DI compatible configuration.
157		* @param string\|null $name array key to be used to store target, if `null` is given target will be append
158		* to the end of the array by natural integer key.
159		*/
160	2	public function addTarget($target, ?string $name = null): void
161		{
162	2	if (!$target instanceof Target) {
163		$this->isTargetsInitialized = false;
164		}
165
166	2	if ($name === null) {
167	2	$this->targets[] = $target;
168		} else {
169	1	$this->targets[$name] = $target;
170		}
171	2	}
172
173	4	public function begin(string $token, array $context = []): void
174		{
175	4	if (!$this->enabled) {
176	1	return;
177		}
178
179	4	$category = $context['category'] ?? 'application';
180
181	4	$message = array_merge($context, [
182	4	'token' => $token,
183	4	'category' => $category,
184	4	'nestedLevel' => $this->nestedLevel,
185	4	'beginTime' => microtime(true),
186	4	'beginMemory' => memory_get_usage(),
187		]);
188
189	4	$this->pendingMessages[$category][$token][] = $message;
190	4	$this->nestedLevel++;
191	4	}
192
193	4	public function end(string $token, array $context = []): void
194		{
195	4	if (!$this->enabled) {
196	1	return;
197		}
198
199	4	$category = $context['category'] ?? 'application';
200
201	4	if (empty($this->pendingMessages[$category][$token])) {
202		throw new \InvalidArgumentException(
203		'Unexpected ' . static::class .
204		'::end() call for category "' .
205		$category .
206		'" token "' .
207		$token . '". A matching begin() is not found.'
208		);
209		}
210
211	4	$message = array_pop($this->pendingMessages[$category][$token]);
212	4	if (empty($this->pendingMessages[$category][$token])) {
213	4	unset($this->pendingMessages[$category][$token]);
214
215	4	if (empty($this->pendingMessages[$category])) {
216	4	unset($this->pendingMessages[$category]);
217		}
218		}
219
220	4	$message = array_merge(
221	4	$message,
222		$context,
223		[
224	4	'endTime' => microtime(true),
225	4	'endMemory' => memory_get_usage(),
226		]
227		);
228
229	4	$message['duration'] = $message['endTime'] - $message['beginTime'];
230	4	$message['memoryDiff'] = $message['endMemory'] - $message['beginMemory'];
231
232	4	$this->messages[] = $message;
233	4	$this->nestedLevel--;
234	4	}
235
236	2	public function flush(): void
237		{
238	2	foreach ($this->pendingMessages as $category => $categoryMessages) {
239		foreach ($categoryMessages as $token => $messages) {
240		if (!empty($messages)) {
241		$this->logger->log(
242		LogLevel::WARNING,
243		'Unclosed profiling entry detected: category "' . $category . '" token "' . $token . '"' . ' ' .
244		__METHOD__
245		);
246		}
247		}
248		}
249
250	2	$this->pendingMessages = [];
251	2	$this->nestedLevel = 0;
252
253	2	if (empty($this->messages)) {
254		return;
255		}
256
257	2	$messages = $this->messages;
258
259		// new messages could appear while the existing ones are being handled by targets
260	2	$this->messages = [];
261
262	2	$this->dispatch($messages);
263	2	}
264
265		/**
266		* Dispatches the profiling messages to {@see targets}.
267		*
268		* @param array $messages the profiling messages.
269		*/
270	1	protected function dispatch(array $messages): void
271		{
272	1	foreach ($this->getTargets() as $target) {
273	1	$target->collect($messages);
274		}
275	1	}
276		}
277

yiisoft / profiler

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Profiler::__construct() A

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